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[v2,06/19] target/i386: sev: Use ram_block_discard_disable()

Message ID 20200520123152.60527-7-david@redhat.com
State Superseded
Headers show
Series [v2,01/19] exec: Introduce ram_block_discard_(disable|require)() | expand

Commit Message

David Hildenbrand May 20, 2020, 12:31 p.m. UTC 
AMD SEV will pin all guest memory, mark discarding of RAM broken. At the
time this is called, we cannot have anyone active that relies on discards
to work properly.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
 target/i386/sev.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/target/i386/sev.c b/target/i386/sev.c
index 51cdbe5496..cadaefc08d 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -719,6 +719,7 @@  sev_guest_init(const char *id)
     ram_block_notifier_add(&sev_ram_notifier);
     qemu_add_machine_init_done_notifier(&sev_machine_done_notify);
     qemu_add_vm_change_state_handler(sev_vm_state_change, s);
+    g_assert(!ram_block_discard_disable(true));
 
     return s;
 err: